But how to turn these advances into a profitable business? The new imaging may have to go beyond diagnosing only symptomatic patients to find a bigger market, as a routine test akin to cholesterol screening in millions of healthy people. To accelerate the imaging revolution, researchers say, the FDA should adopt a sleeker and less-costly approval process for new agents. To that recipe add a dollop of magic:a few big successes in human trials to prove their health-altering potential.

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